| package org.eclipse.swt.widgets; |
| |
| /* |
| * (c) Copyright IBM Corp. 2000, 2001. |
| * All Rights Reserved |
| */ |
| |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.internal.*; |
| import org.eclipse.swt.internal.gtk.*; |
| import org.eclipse.swt.graphics.*; |
| |
| /** |
| * Instances of this class provide an etched border |
| * with an optional title. |
| * <p> |
| * Shadow styles are hints and may not be honoured |
| * by the platform. To create a group with the |
| * default shadow style for the platform, do not |
| * specify a shadow style. |
| * <dl> |
| * <dt><b>Styles:</b></dt> |
| * <dd>SHADOW_ETCHED_IN, SHADOW_ETCHED_OUT, SHADOW_IN, SHADOW_OUT, SHADOW_NONE</dd> |
| * <dt><b>Events:</b></dt> |
| * <dd>(none)</dd> |
| * </dl> |
| * <p> |
| * IMPORTANT: This class is <em>not</em> intended to be subclassed. |
| * </p> |
| */ |
| public class Group extends Composite { |
| int frameHandle; |
| String text=""; |
| |
| /** |
| * Constructs a new instance of this class given its parent |
| * and a style value describing its behavior and appearance. |
| * <p> |
| * The style value is either one of the style constants defined in |
| * class <code>SWT</code> which is applicable to instances of this |
| * class, or must be built by <em>bitwise OR</em>'ing together |
| * (that is, using the <code>int</code> "|" operator) two or more |
| * of those <code>SWT</code> style constants. The class description |
| * for all SWT widget classes should include a comment which |
| * describes the style constants which are applicable to the class. |
| * </p> |
| * |
| * @param parent a composite control which will be the parent of the new instance (cannot be null) |
| * @param style the style of control to construct |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the parent is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li> |
| * <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li> |
| * </ul> |
| * |
| * @see SWT |
| * @see Widget#checkSubclass |
| * @see Widget#getStyle |
| */ |
| public Group (Composite parent, int style) { |
| super (parent, checkStyle (style)); |
| } |
| static int checkStyle (int style) { |
| /* |
| * Even though it is legal to create this widget |
| * with scroll bars, they serve no useful purpose |
| * because they do not automatically scroll the |
| * widget's client area. The fix is to clear |
| * the SWT style. |
| */ |
| return style & ~(SWT.H_SCROLL | SWT.V_SCROLL); |
| } |
| |
| void createHandle(int index) { |
| state |= HANDLE; |
| |
| eventBoxHandle = OS.gtk_event_box_new (); |
| if (eventBoxHandle == 0) error (SWT.ERROR_NO_HANDLES); |
| |
| frameHandle = OS.gtk_frame_new(null); |
| if (frameHandle == 0) error (SWT.ERROR_NO_HANDLES); |
| |
| handle = OS.gtk_fixed_new(); |
| if (handle == 0) error (SWT.ERROR_NO_HANDLES); |
| } |
| |
| void _setHandleStyle() { |
| int shadow = OS.GTK_SHADOW_IN; |
| if ((style & SWT.SHADOW_IN) != 0) shadow = OS.GTK_SHADOW_IN; |
| if ((style & SWT.SHADOW_OUT) != 0) shadow = OS.GTK_SHADOW_OUT; |
| if ((style & SWT.SHADOW_ETCHED_IN) != 0) shadow = OS.GTK_SHADOW_ETCHED_IN; |
| if ((style & SWT.SHADOW_ETCHED_OUT) != 0) shadow = OS.GTK_SHADOW_ETCHED_OUT; |
| OS.gtk_frame_set_shadow_type(frameHandle, shadow); |
| } |
| |
| void configure() { |
| _connectParent(); |
| OS.gtk_container_add(eventBoxHandle, frameHandle); |
| OS.gtk_container_add(frameHandle, handle); |
| } |
| |
| public Point computeSize (int wHint, int hHint, boolean changed) { |
| checkWidget (); |
| int width = _computeSize(wHint, hHint, changed).x; |
| int height = 0; |
| Point size; |
| if (layout != null) { |
| size = layout.computeSize (this, wHint, hHint, changed); |
| } else { |
| size = minimumSize (); |
| } |
| if (size.x == 0) size.x = DEFAULT_WIDTH; |
| if (size.y == 0) size.y = DEFAULT_HEIGHT; |
| if (wHint != SWT.DEFAULT) size.x = wHint; |
| if (hHint != SWT.DEFAULT) size.y = hHint; |
| width = Math.max (width, size.x); |
| height = Math.max (height, size.y); |
| Rectangle trim = computeTrim (0, 0, width, height); |
| width = trim.width; height = trim.height; |
| return new Point (width, height); |
| } |
| |
| void showHandle() { |
| OS.gtk_widget_show (eventBoxHandle); |
| OS.gtk_widget_show (frameHandle); |
| OS.gtk_widget_show (handle); |
| OS.gtk_widget_realize (handle); |
| } |
| |
| void register () { |
| super.register (); |
| WidgetTable.put (frameHandle, this); |
| } |
| |
| void releaseHandle () { |
| super.releaseHandle (); |
| frameHandle = 0; |
| } |
| |
| void releaseWidget () { |
| super.releaseWidget (); |
| text = null; |
| } |
| |
| void deregister () { |
| super.deregister (); |
| WidgetTable.remove (frameHandle); |
| } |
| |
| int topHandle () { return eventBoxHandle; } |
| int parentingHandle() { return handle; } |
| |
| /* |
| * === GEOMETRY === |
| */ |
| |
| public Rectangle _getClientArea () { |
| /* |
| * The Group coordinates originate at the client area |
| */ |
| int width, height; |
| Point size = _getSize(); |
| width = size.x - _getTrim().left - _getTrim().right; |
| height = size.y - _getTrim().top - _getTrim().bottom; |
| return new Rectangle(0,0, width, height); |
| } |
| |
| Trim _getTrim() { |
| trim = new Trim(); |
| |
| // set up the test widgets |
| int testWindowHandle = OS.gtk_window_new(0); |
| int testHandle = OS.gtk_frame_new(string2bytesConvertMnemonic("Test String")); |
| OS.gtk_container_add(testWindowHandle, testHandle); |
| OS.gtk_widget_realize(testHandle); |
| |
| // get info |
| GtkFrame frame = new GtkFrame(); |
| OS.memmove (frame, testHandle, GtkFrame.sizeof); |
| GtkStyle groupStyle = new GtkStyle(); |
| OS.memmove (groupStyle, frame.style, GtkStyle.sizeof); |
| GtkStyleClass styleClass = new GtkStyleClass(); |
| OS.memmove (styleClass, groupStyle.klass, GtkStyleClass.sizeof); |
| |
| // see gtk_frame_size_allocate() |
| trim.left = trim.right = frame.border_width + styleClass.xthickness; |
| trim.top = frame.border_width + Math.max(frame.label_height, styleClass.ythickness); |
| trim.bottom = frame.border_width + styleClass.ythickness; |
| |
| // clean up |
| OS.gtk_widget_destroy(testHandle); |
| OS.gtk_widget_destroy(testWindowHandle); |
| return trim; |
| } |
| |
| boolean _setSize(int width, int height) { |
| boolean differentExtent = UtilFuncs.setSize (topHandle(), width,height); |
| Point clientSize = UtilFuncs.getSize(frameHandle); |
| // WRONG but it's quite safe - the frame clips it |
| UtilFuncs.setSize (handle, clientSize.x, clientSize.y); |
| return differentExtent; |
| } |
| /* ========= Model Logic ========= */ |
| |
| String getNameText () { |
| return getText (); |
| } |
| /** |
| * Returns the receiver's text, which is the string that the |
| * is used as the <em>title</em>. If the text has not previously |
| * been set, returns an empty string. |
| * |
| * @return the text |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public String getText () { |
| if (!isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS); |
| if (!isValidWidget ()) error (SWT.ERROR_WIDGET_DISPOSED); |
| return text; |
| } |
| |
| |
| /** |
| * Sets the receiver's text, which is the string that will |
| * be displayed as the receiver's <em>title</em>, to the argument, |
| * which may not be null. |
| * |
| * @param text the new text |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public void setText (String string) { |
| if (!isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS); |
| if (!isValidWidget ()) error (SWT.ERROR_WIDGET_DISPOSED); |
| if (string == null) error (SWT.ERROR_NULL_ARGUMENT); |
| OS.gtk_frame_set_label (frameHandle, string2bytesConvertMnemonic(string)); |
| text=string; |
| } |
| |
| } |